Sheet-metal-oven bottom for ranges



(No Model.) 2 Sheets-Sheet 1.

W. H. WHITEHEAD. SHEET METAL OVEN BOTTOM FOR RANGES.

No. 479,770. Patented July 26, 1892.

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SHEET METAL OVEN BOTTOM FOR RAN ES; No. 479,770. Patented July 26, 1892.

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WILLIAM H. WHITEHEIAD,

OF ERIE, PENNSYLVANIA.

SHEE'T-METAL-OVENBOTTOM FOR RANGES.

SPECIFICATION forming part of- Letters Patent No. 479,770, dated July26, 1892.

Application filed March 21, 1892. Serial No. 425,869. (No model.)

To all whom it may concern:

Be it known that I, WILLIAM H. WHITE- HEAD, a citizen of theUnitedStates, residing at the city of Erie, in the county of Erie and State ofPennsylvania, have invented certain new and useful ImprovementsinSheet-Metal-Oven Bottoms for Ranges; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same, reference being had to the accompanying drawings,and to the letters of reference'marked thereon, forming part of thisspecification.

My invention consists in the improvements in sheet-metal range-ovenbottoms, hereinafter set forth and explained, and illustrated in theaccompanying drawings, in which Figure 1 is a plan View of the underside of my improved sheet-metal range-oven bottom as used in cast-metalranges. Fig. 2 is a like view of a modified construction of the same.Fig. 3 is a plan View of the under side of the bottom of my improvedsheet-metal rangeoven bottom, as used in wrought-steel ranges. Fig. 4 isa perspective view of a range, a portion of which is broken away,embodying my improved sheet-metal oven.

Like letters refer to like parts in all of the figures.

The object of my invention is to overcome the tendency ofsheet-metal-oven bottoms to buckle when first heated because of theirbeing thin and sooner afiected by the heat than other portions of therange. To overcome this difficulty, I provide the under side of thesheet-metal plate forming the bottom of the oven with stiifening-bars ofdiiferent shapes, so secured to the under side of the plate that theexpansion and contraction thereof will allow the parts to so adjustthemselves to each other as to prevent the breakage of thestifiening-bars or of the clamps or bolts by which they are secured tothe plate, which stiffening-bars prevent the buckling of the sheetmetalplate and atthe same time stiffen it sufficiently so that it willreadily support weights placed thereon, thus permitting the use of muchthinner sheet metal in the ovenbottom than is otherwise possible, bymeans of which the oven can be heated with much greater economy of fuelthan can be done with range-ovens as heretofore constructed.

The constrnct-ionof my invention as shown in Fig. 1 consists incast-metal frameA,within which a sheet-metal plate B, adapted to formthe bottom of the oven, is secured by bolts or rivets a, passing throughholes bin the margin of the plate B and in the frame A.

Secured to the central portion of the under side of the plate B is alongitudinal bar 0, having a notch 01 therein to engage with thevertical partition (not shown) forming the fines beneath the oven, oneend of the bar 0 being secured to the plate B by passing loosely throughclips D D, secured to the bottom of the plate B, and the other end bymeans of bolts or rivets E, passing through the plate B and throughslotted holes 0 c in said bar 0, so as to provide for the unequalexpansion and contraction of the plate B and bar 0.

Midway between the sides of the frame A and the central bar 0, I securelongitudinal stiffening-bars F F to the under side of the plate B bymeans of clips G, secured to the plate B by means of bolts or rivets 6,through which clips G the bars F are adapted to move freely, so as toprovide for the unequal expansion and contraction of the plate B andbars F.

In Fig. 2 I show the same construction as I have heretofore explained inthe description of Fig. 1, except that in lieu of the longitudinal barsG G,I use the longitudinal barsH H, each of which is provided withlateral projections 1, having slotted holes htherein, through whichsmall bolts f, passing through holes in the plate B, secure the bars H Hto the under side of the plate B, the holes 71. being slotted so as toprovide for the unequal expansion and contraction of plate B and bars H.

In Fig. 3 I show the bars as last described secured to the bottom of asheet-metal oven, such as is ordinarily used in the construction ofsteel ranges. In this construction of the oven the bottom, ends, and topof the oven are made ordinarily of a continuous strip of sheet metal,preferably sheet-steel, having the rear side thereof closed by a plate Jof like material riveted to outwardly-turned flanges K on the bottom,ends, and top of the oven,

this doing away with the cast-metal frame A,"

described in the construction shown in Figs. 1 and 2. In thisconstruction the central longitudinal bar 0 is of the same constructionand is secured to the bottom plate 13 of this oven in substantially thesame manner as has been heretofore explained in the description ofFig.1. The side bars H H are likewise made of the same shape and securedto the 1. The combination, in a sheet-metal-oven bottom, of asheet-metal plate, as B, and a frame, as A, secured to the peripherythereof, with longitudinal bars secured to the under side of saidsheet-metal plate in such a manner as to provide for the unequalexpansion and contraction of the sheet-metal plate and the bars securedthereto, substantially as and for the purpose set forth.

2. The combination, in a sheet-metal oven, of a bottom consisting of aplate of sheet metal, with longitudinal bars secured thereto by means ofbolts passing through slotted holes in said bars, substantially as andfor the purpose set forth.

In testimony whereof I aflix my signature in presence of two witnesses.

WILLIAM H,

Witnesses:

CHAS. OBRIEN, JOHN S. BILLING.

WHITEHEAD.

